A danger foreseen is half avoided danger, half, avoided, foreseen

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A danger foreseen is half avoided.隐患能预见，危险去一半。
Danger，危险，风险。In danger在危险中/ make danger of对…踌躇不决；认为…难办/ out of danger脱离危险
　　Foreseen，是动词foresee的过去分词。在这里修饰动词danger做定语。Foresee, know that something is going to happen before it actually happens.预见；预知。Foreseer:预见者。/ in the foreseen future在可以预见到的将来。
　　Avoid, to do something to prevent something bad from happening.避免，回避。He avoided meeting her eye.他避开她的目光。
　　这句谚语其实就是告诉我们一个道理：防范于未然。